All the formations of the Army from the Leh-based 14 Corps to the 3 Corps in Northeast deployed along the China border are also on alert to check any attempt by the PLA troops to enter Indian territory, they said.
A platoon of Chinese troops had intruded into the Indian territory on April 15 and erected its tents there claiming that they are well within their area after which India also stationed a small military camp of Army and ITBP troops near their location.
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At the moment, the Army has been told to keep an eye on the movement of Chineese troops and adopt a "non-aggressive approach" in the area but if the PLA increases its troops size, the force will also increase its numbers there, the sources said.
Around 30 Chinese troops are based in two locations including a tented area and another place where the soldiers of the two sides are facing each other with banners in their hands, they said.
The sources said the Chinese troops are from the Border Defence Regiment of the PLA which is located 25 kms north of the location where they have erected their tents.
The Chinese side, they said, is believed to be getting its supplies from its parent unit through the Raki Nala which flows from Chinese side into the Indian side.
The Chinese troops are armed with assault rifles and no heavy weapon has been seen so far with them. They also have two small vehicles for supporting their movement, the sources said.
They said the Indian side may seek a flag meeting with the Chinese but so far it has not been decided.
The two sides have already had two rounds of flag meetings without any success as the Chinese troops have not yet left from there.